package com.whh.filter;

import com.whh.pojo.User;
import com.whh.util.Constants;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/jsp/*")
public class SysFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }
    @Override
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest request=  (HttpServletRequest)req;
        HttpServletResponse response =  (HttpServletResponse)resp;
       User user= (User)request.getSession().getAttribute(Constants.USER_SESSION);
       if (user==null){
           request.getRequestDispatcher("/jsp/error.jsp").forward(request,response);
           //response.sendRedirect(request.getContextPath()+"/jsp/error.jsp");
       }else {
           chain.doFilter(req,resp );
       }
    }

    @Override
    public void destroy() {

    }
}
